Selection pressure is the term used widely in evolutionary biology. If you can't get past that choice of words, you wouldn't be able to get anywhere in actually

Selection pressure is the term used widely in evolutionary biology. If you can't get past that choice of words, you wouldn't be able to get anywhere in actually studying the subject, as that choice of words is used throughout. http://scholar.google.co.uk/scholar?q=selection+pressure+evolution http://scholar.google.co.uk/scholar?q=selection+pressure+evo...